Question

A train 100m long completely passes a man walking in the same direction at 6kmph in 5s and a car travelling in the same direction in 6s find the speed of car

Answer 1

Answer:

Answer:  Ans: 18 km/h

Explanation:

Solution:

A train 100 meter long completely passes a man walking in the same direction at 6 km/h in 5 seconds. (x = train)

5 = 100*18 / (x-6)*5

=> 5 = 1800 / (x-6)*5

=> 5 = 1800 / 5x-30

=> 25x - 150 = 1800

=> 25x = 1950

=> x = 78

A car travelling in the same direction in 6 seconds. (y = car)

6 = 100*18 / (x-y)*5

=> 6 = 1800 / (78-y)*5

=> 6 = 1800 / 390-5y

=> 2340 - 30 y = 1800

=> -30y = 1800 - 2340

=> -30y = -540

=> y = 18